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Article ; Online: Field Measurements and Machine Learning Algorithms to Monitor Water Quality in Lakes Located in Landscape Parks – A Case Study

Natalia Walczak / Zbigniew Walczak / Ireneusz Laks

Journal of Ecological Engineering, Vol 25, Iss 1, Pp 49-

2024 Volume 64

Abstract: One of the biggest threats to many lakes is their accelerated eutrophication resulting from anthropogenic pressure, agricultural intensification, and climate change. A very important element of surface water protection in environmentally conserved areas ... ...

Abstract	One of the biggest threats to many lakes is their accelerated eutrophication resulting from anthropogenic pressure, agricultural intensification, and climate change. A very important element of surface water protection in environmentally conserved areas is the proper monitoring of water quality and detection of potential threats by examining the physicochemical properties of water and performing statistical analyses that enable possible exposure of unfavourable trends. The article presents the analyses of the results of measurements made in three lakes located in the Sierakowski Landscape Park. As part of the measurements, water quality indicators i.e., phosphorus, nitrogen, BOD5 and COD, were determined monthly for a year at the inflows and outflows of the studied lakes. The test results of selected water quality indicators were analysed using machine learning algorithms i.e., PCA and k-means. The conducted tests enabled statistical estimation of changes in water quality indicators in the reservoirs and evaluation of their correlation.
Keywords	nitrogen ; phosphorus ; cod ; pca ; bod5 ; k-means ; anova ; quality of water in lakes ; Environmental technology. Sanitary engineering ; TD1-1066 ; Environmental sciences ; GE1-350
Subject code	550
Language	English
Publishing date	2024-01-01T00:00:00Z
Publisher	Polish Society of Ecological Engineering (PTIE)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: ECONOMIC EVALUATION OF MAINTAINING THE CAPACITY OF TRASH RACKS IN HYDRAULIC ENGINEERING STRUCTURES

Natalia Walczak

Journal of Ecological Engineering, Vol 18, Iss 3, Pp 195-

2017 Volume 201

Abstract: Considering the limited capabilities of obtaining energy in a traditional way from coal combustion and the requirements of the European Union, other alternative energy sources should be sought. They have been being increasingly used by business entities ... ...

Abstract	Considering the limited capabilities of obtaining energy in a traditional way from coal combustion and the requirements of the European Union, other alternative energy sources should be sought. They have been being increasingly used by business entities and individual investors and are designed to provide financial profits, which will be ensured only with correct operation of the energy system. One of examples of alternative energy sources application is the construction of small hydropower plants, where the efficiency of all elements included is of great importance. The article analyses financial losses incurred by owners of power plants when the energy system lacks 100% capacity of the inlet channel. Material that accumulates on SHP trash racks might be analysed in two ways: biologically (these are screenings – as in wastewater treatment plants) and hydraulically.
Keywords	trash racks ; small hydropower plant ; economic ; Environmental technology. Sanitary engineering ; TD1-1066 ; Environmental sciences ; GE1-350
Subject code	690
Language	English
Publishing date	2017-05-01T00:00:00Z
Publisher	Polish Society of Ecological Engineering (PTIE)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Preliminary Studies of the Water Quality in the Reservoir Wielkopolska at Different Times of Operation on the Basis of Selected Indicators

Natalia Walczak / Zbigniew Walczak

Journal of Ecological Engineering, Vol 22, Iss 2, Pp 77-

2021 Volume 85

Abstract: The demographic and urban expansion of the nineteenth century led to a significant reduction in water resources. One of the considered solutions to this problem was to retain water in reservoirs. Over the years it has been recognized that the ... ...

Abstract	The demographic and urban expansion of the nineteenth century led to a significant reduction in water resources. One of the considered solutions to this problem was to retain water in reservoirs. Over the years it has been recognized that the construction of small reservoirs can bring greater benefits than large ones. Large reservoirs are not only associated with substantial economic costs, i.e. for the purchase of land, but they also do not sufficiently serve as the components of a flood protection system. They are also of minor importance in the production of so-called ''white energy” (Lehner et al., 2005) and may have a negative impact on the environment. The size and age of reservoirs as well as the type of water dams and their work regime affect the scale of changes in the natural fluvial environment (Robinson et al., 2003). Small reservoirs are a basic element of small water retention, in which water quality depends to a large extent on their location, the way their catchment areas are managed and the functions they perform (apart from typical retention reservoirs). The catchments used for agricultural purposes may be susceptible to accumulation of biogenic substances (nitrogen and phosphorus), and other pollution (Hejduk, 2010; Kanownik et al., 2013; Kasperek et al., 2013; Wiatkowski et al., 2013). The article initially tested the quality of the water in three reservoirs, different period of operation with use of selected indicators. For the purposes of research and this resultant publication, water quality was tested in three reservoirs differing in operating times. It was assumed that the study period covering autumn, spring and early summer was the period with the most visible changes in concentrations of pollutants. Samples taken from the reservoirs were analysed by determining in turn biological oxygen demand (BOD5), ammonia concentration (NH4), phosphate concentration (PO4) and total suspended solids. The use of indicators allowed for assessing the quality of water in these reservoirs and comparing ...
Keywords	reservoirs ; nitrogen ; phosphorus ; water quality ; bod5 ; total suspended solids ; Environmental technology. Sanitary engineering ; TD1-1066 ; Environmental sciences ; GE1-350
Subject code	550
Language	English
Publishing date	2021-02-01T00:00:00Z
Publisher	Polish Society of Ecological Engineering (PTIE)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Utilizing an Amino Acid Scaffold to Construct Heteroditopic Receptors Capable of Interacting with Salts under Interfacial Conditions

Damian Jagleniec / Natalia Walczak / Łukasz Dobrzycki / Jan Romański

International Journal of Molecular Sciences, Vol 22, Iss 10754, p

2021 Volume 10754

Abstract: A 4-nitro-L-phenylalanine scaffold was used to construct effective ion pair receptors capable of binding anions in an enhanced manner with the assistance of alkali metal cations. A benzocrown ether was linked to a receptor platform via the amide function ...

Abstract	A 4-nitro-L-phenylalanine scaffold was used to construct effective ion pair receptors capable of binding anions in an enhanced manner with the assistance of alkali metal cations. A benzocrown ether was linked to a receptor platform via the amide function so as to support the squaramide function in anion binding and to allow all three NHs to act simultaneously. The binding properties of the receptors were determined using UV-vis, 1 H NMR, 2D NMR, and DOSY spectroscopy in MeCN and in the solid state by X-ray measurements. Ion pair receptor 2 was found to interact with the most strongly with salts, and the removal of its key structural elements was shown to hinder the receptor action. The amide proton was recognized to switch from having involvement in an intramolecular hydrogen bond to interacting with anions upon complexation. Apart from carboxylates, which promote deprotonation, and other monovalent salts creating 1:1 complexes with the receptor, more complex equilibria were established upon the complexation of 2 with sulfates. Receptor 2 was shown to be capable of the extraction of ion pairs from the aqueous to organic phase and of the cation-enhanced transport chloride and sulfate anions across a bulk chloroform membrane. These features may open the door for its use in regulating ion concertation under interfacial conditions and acting as a potential drug to treat channelopathies.
Keywords	ion pair recognition ; 4-nitro-L-phenylalanine ; squaramide ; crown ether ; anion transport ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
Subject code	540
Language	English
Publishing date	2021-10-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: The Influence of the Selected Turbulence Model and Grid Density Degree on the Results of Velocity Distribution Obtained with the Use of the Simulation Program SSIIM

Mateusz Hammerling / Natalia Walczak / Jakub Nieć

Journal of Ecological Engineering, Vol 19, Iss 3, Pp 106-

2018 Volume 114

Abstract: In this paper were analyzed water flow parameters in the local scour created after building a stones sills No 3 km 480 + 902 and 4 km 479 + 225 below reservoir Jeziorsko on the river Warta. The analysis were carried out using the result of field ... ...

Abstract	In this paper were analyzed water flow parameters in the local scour created after building a stones sills No 3 km 480 + 902 and 4 km 479 + 225 below reservoir Jeziorsko on the river Warta. The analysis were carried out using the result of field measurements (velocity distributions) and SSIIM (freeware) software. The study of the geometry of the local scour, were used to create a numerical model and implementing it to the SSIIM software. In research the impact of grid density on the obtained results were estimated. The results included assessment qualitative and quantitative. The conducted analysis can be used to determining the movement of sediment in local scour, and can predict the development in time, and also specify the sill stability in different conditions of the water flow.
Keywords	velocity distribution ; turbulence model ; mathematical modelling ; sill ; Environmental technology. Sanitary engineering ; TD1-1066 ; Environmental sciences ; GE1-350
Language	English
Publishing date	2018-05-01T00:00:00Z
Publisher	Polish Society of Ecological Engineering (PTIE)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Helicobacter pylori outer membrane vesicles involvement in the infection development and Helicobacter pylori-related diseases

Magdalena Chmiela / Natalia Walczak / Karolina Rudnicka

Journal of Biomedical Science, Vol 25, Iss 1, Pp 1-

2018 Volume 11

Abstract: Abstract Helicobacter pylori - (H. pylori) play a role in the pathogenesis of gastritis, gastric and duodenal ulcers as well as gastric cancer. A possible involvement of outer membrane vesicles (OMVs) produced by H. pylori in the distribution of ... ...

Abstract	Abstract Helicobacter pylori - (H. pylori) play a role in the pathogenesis of gastritis, gastric and duodenal ulcers as well as gastric cancer. A possible involvement of outer membrane vesicles (OMVs) produced by H. pylori in the distribution of bacterial antigens through the gastric epithelial barrier and their role in the development of local and systemic host inflammatory and immune responses has been suggested. OMVs contain various biologically active compounds, which internalize into host cells affecting signaling pathways and promoting apoptosis of gastric epithelial and immunocompetent cells. OMVs-associated H. pylori virulence factors may strengthen or downregulate the immune responses leading to disease development. This review describes the biological importance of H. pylori OMVs and their role in the course of H. pylori infections, as well as H. pylori related local and systemic effects.
Keywords	Helicobacter pylori ; outer membrane vesicles ; virulence factor ; inflammation ; gastritis ; Medicine ; R
Subject code	570
Language	English
Publishing date	2018-11-01T00:00:00Z
Publisher	BMC
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: AGRICULTURAL USE OF FLOODPLAINS ABOVE JEZIORSKO RESERVOIR

Natalia Walczak / Mateusz Hämmerling / Anna Szymczak-Graczyk

Inżynieria Ekologiczna, Vol 18, Iss 4, Pp 225-

2017 Volume 233

Abstract: Flood plains are specific sedimentary environment. They are a natural clarifier tank and filter for rivers carrying various impurities m. in .: heavy metals, biogenic elements, which are transported during floods and floods. Much of it is accumulated on ... ...

Abstract	Flood plains are specific sedimentary environment. They are a natural clarifier tank and filter for rivers carrying various impurities m. in .: heavy metals, biogenic elements, which are transported during floods and floods. Much of it is accumulated on the river bank called bufferstrip. It is a strip of land lying along the watercourses, often overgrown with riparian plant associations related functionally to the flooding of the river and forming a transition zone ecosystems of plants oak-hornbeam forest. Very often vegetation found in this strip is made up of annual plants, shrubs and trees of different heights and characterized by various density. Some of these areas is used for agriculture as pastures and meadows, where you can get for animal feed. Based on aerial photographs, maps and studies showed significant differences in the way development in the analyzed part of valley. Much smaller growth of shrubs, rather its lack is observed in areas used for grazing cattle. Despite the favorable conditions for development (access water and light) through continuous mowing of vegetation by animals did not develop in a manner threatening reducing bandwidth floodplains.
Keywords	vegetation ; floodplains ; field ; grassland ; Environmental sciences ; GE1-350
Subject code	333
Language	Polish
Publishing date	2017-08-01T00:00:00Z
Publisher	Polish Society of Ecological Engineering (PTIE)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: THE POSSIBILITIES OF USING HEC-RAS SOFTWARE FOR MODELLING HYDRAULIC CONDITIONS OF WATER FLOW IN THE FISH PASS EXAMPLED BY THE POMIŁOWO BARRAGE ON THE WIEPRZA RIVER

Mateusz Hammerling / Natalia Walczak / Zbigniew Walczak / Paweł Zawadzki

Journal of Ecological Engineering, Vol 17, Iss 2, Pp 81-

2016 Volume 89

Abstract: The aim of the article is to analyse hydraulic conditions of water flow in a fish pass. The test facility is part of the Pomiłowo barrage in the commune of Sławno, Poland. The authors applied HEC-RAS software for modelling hydraulic parameters of the ... ...

Abstract	The aim of the article is to analyse hydraulic conditions of water flow in a fish pass. The test facility is part of the Pomiłowo barrage in the commune of Sławno, Poland. The authors applied HEC-RAS software for modelling hydraulic parameters of the water flow in the fish pass. The data from field measurements was implemented in the software and calculations of changes in the water table in the fish pass were made. The results confirmed the usefulness of HEC-RAS software for estimating hydraulic parameters of water flow in a fish pass. HEC-RAS software enables to take into account the parameters responsible for the phenomena accompanying the flow through a fish pass. Selecting mathematical model parameters (coefficients) should be preceded by a multidimensional analysis of the facility. More precise information on hydraulics, hydrology and biology of the test fish pass are also required.
Keywords	field measurements ; fish pass ; water table topology ; HEC-RAS ; Environmental technology. Sanitary engineering ; TD1-1066 ; Environmental sciences ; GE1-350
Subject code	333
Language	English
Publishing date	2016-04-01T00:00:00Z
Publisher	Polish Society of Ecological Engineering (PTIE)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: THE EFFECT OF THE GEOMETRIC STRUCTURE OF FLOOD PLAIN VEGETATION ON THE PROBABILITY OF PASSING FOR PLANT DEBRIS

Natalia Walczak / Zbigniew Walczak / Mateusz Hammerling

Journal of Ecological Engineering, Vol 17, Iss 4, Pp 304-

2016 Volume 310

Abstract: Flood plains are a specific sedimentary environment. They are a natural clarifier and filter for rivers carrying large amounts of heavy metals, biogenic elements and other contaminants transported during high water and floods. Plenty of it is accumulated ...

Abstract	Flood plains are a specific sedimentary environment. They are a natural clarifier and filter for rivers carrying large amounts of heavy metals, biogenic elements and other contaminants transported during high water and floods. Plenty of it is accumulated in the riverbank zone of channels i.e. a buffer strip. This is a relatively narrow strip of land situated along watercourses, often covered with riparian plants. It is functionally associated with river flooding and it forms a transition zone to ecosystems of mixed (oak-lime-hornbeam) forest plants. These plants unquestionably grow into a natural protective system of surface waters against contamination flowing down from areas used for agricultural purposes. Buffer zones provide the opportunity for self-cleaning, and according researchers they are among the most efficient natural tools to protect a catchment area. They can reduce the amount of sediments and nutrients carried by surface water flowing down from agricultural areas. Besides positive effects, the zones are accompanied by the phenomenon of flow blockage, which is particularly hazardous in case of directing great water away from its main channel. Shrubby vegetation retains small elements of plant origin and thus the free flow of water stopped. The article analyses the effect of vegetation structure density on flow conditions for small plant debris on a laboratory scale.
Keywords	geometric structure ; flood plain ; vegetation ; debris ; Environmental technology. Sanitary engineering ; TD1-1066 ; Environmental sciences ; GE1-350
Language	English
Publishing date	2016-09-01T00:00:00Z
Publisher	Polish Society of Ecological Engineering (PTIE)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: COMPARISON OF THE ENVIRONMENTAL IMPACT OF DIFFERENT METHODS OF MINING WASTE DISPOSAL TECHNOLOGY USING AHP METHOD

Justyna Kubicz / Mateusz Hämmerling / Natalia Walczak

Inżynieria Ekologiczna, Vol 47, Pp 131-

2016 Volume 136

Abstract: Exploitation of tailing ponds sites for storing all types of waste materials creates multiple problems concerning waste disposal and the environmental impact of the waste. Tailing ponds waste may comprise e.g. flotation tailings from ore enrichment ... ...

Abstract	Exploitation of tailing ponds sites for storing all types of waste materials creates multiple problems concerning waste disposal and the environmental impact of the waste. Tailing ponds waste may comprise e.g. flotation tailings from ore enrichment plants. Despite the fact that companies / corporations use state-of-the-art methods of extraction and processing of copper ore, and introduce modern systems of organization and production management, the area located closest to the reservoir is exposed to its negative effects. Many types of waste material are a valuable source of secondary raw materials which are suitable for use by various industries. Examples of such materials are mining waste (flotation tailings), usually neutral to the environment, whose quantities produced in the process of exploitation of minerals is sizeable. The article compares different technological methods of mining waste disposal using AHP method and their environmental impact.
Keywords	hierarchical problem analysis ; flotation tailings ; environmental impact ; tailing pond ; Environmental sciences ; GE1-350
Language	Polish
Publishing date	2016-05-01T00:00:00Z
Publisher	Polish Society of Ecological Engineering (PTIE)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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